This type of fishing is similar to a nonrenewable mining operation because fishes are very vulnerable, typically long - lived, and have very low productivity in the dark, cold depths.
The mercury content of esculent fresh water fishes produced from Shanghai was determined by means of the cold atomic absorption luminosity.
以上海地区出产的食用淡水鱼为试样，通过冷原子吸收光度法检测鱼体中的汞含量。
3
The Chinese gobioid fishes may be grouped in three types, viz. , the warm-water, the warm-temperate and the cold-temperate species, the type of cold-water species being absent.